The story, character development, world building, being an RPG and building our characters how we want too. See everything Pre-Mass Effect 2. They are a dim shadow of their former selves, there was a day when the Bioware name meant something other than half-assed games with tons of bugs.

I'd look at everything from ME2 back. My first Bioware game was Knights of the Old Republic and goddamn I wasn't ready! Absolutely blew my mind and Jade Empire and then Mass Effect and boy I was in love but just a few more years and it was over for me ☹️

I still like there stuff, but they are suffering from the ole advancement syndrome. And EA. The games they use to make and the style they used to make them are not lucrative enough for EA unfortunately.